526 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



2. CASIMIROA ' Llave & Lex. Nov. Veg. Descr. 2: 2. 1825. 



Unarmed trees or shrubs; leaves persistent, alternate, digitate, the leaflets 

 coriaceous, usually entire ; flowers small, perfect ; fruit a drupe, 2 to 5-celled, 

 with a single seed in each cell. 

 Leaflets densely velvety-pubescent beneath. 



Leaflets 3, obtuse; petioles 1.5 to 3 cm. long 1. C. pubescens. 



Leaflets usually 5, acuminate; petioles 3 to 12 cm. long 2. C. tetrameria. 



Leaflets glabrous beneath or nearly so, sometimes pilose along the costa. 



Fruit 1.2 to l.S cm. in diameter 3. C. pringlei. 



Fruit 5 to 10 em. in diameter. 



Leaflets obtuse 4. C. watsonii. 



Leaflets acuminate. 



Leaflets 5 or rarely 7, the lateral ones sessile or on short stout petiolules. 



5. C. edulis. 

 Leaflets usually 3, the lateral ones on slender petiolules 1 to 3 cm. long. 



6. C. sapota. 



1. Casimiroa pubescens Ramirez, Anal. Inst. Med. Nac. Mex. 2:19. pi. 5. 



1896. 



Quer^taro and San Luis PotosI; type from El Madrono, Sierra Gorda. 

 Quer^taro, altitude 2,400 meters. 



Shrub, about 2 meters high, much branched, densely pubescent; leaflets 3 

 or soniftimos 1, oblong-obovate to elliptic, 4 to 0.5 cm. long; fruit depressed- 

 globose, about 4 cm. broad, pubescent, the pulp white and scanty ; seeds 5 or 6. 

 "Zapote de rata" (Quer^taro). 



2. Casimiroa tetrameria Millsp. Field Mus. Bot. 1:401. 1898. 



Yucatan and Michoacan ; type from Xcholac, Yucatan. Guatemala to Costa 

 Rica. 



Tree, 6 to 15 meters high, with rounded crown ; leaflets oblong-ovate to elliptic, 

 usually 7 to 16 cm. long, entire or obscurely crenate. " Matasano " (Ccsta Rica, 

 Honduras). 



The fruit of this species is not known to the writer, but it is probably 

 similar to that of C. ediilis. This species has been confused with C. sapota, 

 but it is more closely related to C edulis, of which it may be only a pubescent 

 form. 



3. Casimiroa pringlei (S. Wats.) Engl, in Engl. & Prantl, Pflanzenfam. 3 *: 178, 



1896. 

 Siargentia pringlei S. Wats. Proc. Amer. Acad. 26: 134. 1891. J 



Nuevo Leon, San Luis PotosI, and Durango ; type from San Jos6 Pass. San 



Luis PotosI. 



Shrub or small tree, 3 to 5 meters high, with grayish bark ; leaflets 2 or 3, 



obovate or elliptic, 3 to 9 cm. long, obtuse or acutish. glabrous or nearly so. 



entire ; flowers greenish yellow ; fruit subglobose or oval, 1.2 to 1.8 cm. broad ; 



seeds 10 to 12 mm. long. 



*The genus was dedicated to Casiniiro Gomez, of whom the authors write as 

 follows: " Casimiro Gomez, ad Cardonal ex tribu Ottcmitarum edito, viro sobrio 

 ac temperanti, in gerendo bello, promto, sagaci animosissirao, ipsi, quod a luxu 

 abhorrens, et se milites suos humUi victu ac vestitu conservans ac ducens, 

 exigua Ottomitarum manu. innumerabilia ac gloriosissima pro patriae bono 

 gesserit." 



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